Re working my DG 400 electrical system. Adding 2 batteries for instruments only and keeping main batts for ships power only.

I have pulled all of the positive wires off everything that is not motor related. At present there is one main ground buss.

Some of the instruments already have breakers and positive wires from the breaker to the instrument and negative to the ground buss.

Would I create any problem using this common ground buss for the instruments already on it as well as the new instruments. All instruments will be supplied by two LiFePo4 batts. The ships chemistry is lead acid and with my current plan they would both share the same ground buss.

I will be using two separate switches for the new batteries that are pull to unlock SPST.

Thanks

Kevin
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